The young Italian defender joined United three seasons ago and has progressed well through the youth system.
Fornasier admits he models his game on two Italian greats: "When I first arrived, it was Fabio Cannavaro as he'd just won the World Cup and was probably the best player from Italy. So it was him. If not, Paolo Maldini as well.
They are very tough defenders who are good with their feet as well, clever players - especially Maldini."
The teen also told manutd.com: "I like to head the ball a lot. I think I'm aggressive. Maybe I'm not the most technical player yet but I'm more aggressive."